Hot-rolled galvanized steel is a production process in which steel is hot rolled under high temperature conditions and then galvanized. The following is its main process technology:
1. Raw material preparation: Select appropriate steel as raw materials, and pretreat it, such as rust removal, grease removal, etc.
2. Steel heating: the steel is sent into the heating furnace for heating, so that it reaches the appropriate rolling temperature.
3. Hot rolling: the heated steel is sent to the mill for continuous rolling, so that it forms the required plate or strip.
4. Cleaning and pickling: there are oxides and other impurities on the surface of the steel after hot rolling, which need to be cleaned and pickling treatment in order to better react with the zinc liquid.
5. Galvanized: After cleaning and pickling the steel into the galvanized tank, contact with the molten zinc liquid, forming a zinc layer covering the surface of the steel.
6. Cooling: The galvanized steel is quickly cooled through the cooling equipment, so that the zinc layer is solidified and firmly combined with the steel.
7. Further processing: According to needs, galvanized steel can be cut, crimp, molding and other further processing operations.
The specific parameters and operation methods of these process technologies will vary depending on the manufacturer and product requirements, but the above is the general production process of hot-rolled galvanized steel.